Sojna



, seven pounds of nitrite of soda, dissolveddn UNITED STATES PATENT QFFIC'E.

RUrERT GREVILLE-WIILLIAl-HS, or ALBANY, NEW YORK, AssIeNoR- TO THE ALBANY COAL TAR DYE AND CHEMICAL COMPANY, or SAME PLACE.

PRocEss OF MAKING AZ'O DYES.

SPEGIFIG A TION forming part of Letters PatentNo. 416,145, dated Hoveinber 26, 18849. Application filed August 6, 1889- Serial No. 319,903. (No specimens.)

To all whom it may concern:

Be it-known that I, RUPERT GREVILLE'-- full, clear, and exact description of the in-- vention, which will enable others skilled in theart to which it appertaids to make and use the same. s

It is well known that insoluble "intermediate bodies formed by the combination of one molecule of a-tetrazo compound with one molecule of a'naphthylamine, or asulphoacid of a naphthylamine, car be converted into soluble coloring-matterhy reacting-on them with another moleculeof a different amine or with a phenol. f

I have now,fonnd that a new class of intermediate bodies can be obtainedby combining' onemolecule of naphthalineflzo-n'aphthylamine, or sulphoacids of thesame, with 0110 molecule of a tetrazo compound, and that these intermediate bodies can be converted into new and useful coloring-matters by reacting on them with anotherfmolecule of one of the naphthylamines or, a su lpho-aci'd of the same.

The following are examples o f how I carry out my process practically: A

Example 1.--Twenty-'five pounds. of 'naphthionate of soda are dissolved in fifty gallons of water,and thirty pounds of muriatic acid, 22 Ban m, are added. The precipitated free naphthionic acid is cooledwithl ice, and

- five times its weight of water, are run .very

slowly in. When the azoti'zation is complete, twenty-five pounds more naphthionate of are added, and then fifteen'pounds of acetate of soda.- The mixture is stirred until the molecule of free naph'thionic acid is combined with the molecule of azo-naphthaline sulphoacid. The reaction is complete whenthe whole product is transformed into a clear, The alpha-naphthalme sulpho acid azo alpha naphthylaminethirty-two pounds of toluidine sulphate, or its line or soap bath, 'and is fast to washing. "lhe'shade is similar to thatpt' the color comobtained. soda, dissolved in twenty gallons of water,

sulpho-acid thus produced (which is awool' dye-stuff in itself) is allowed to react in presence of acetate of soda on the tetrazoditolyl formed in the usual manner by diazotizing 5S equivalent of the base, with fourteen pounds of nitrite of soda. As soon as the tretrazo compound is all combined, twenty-five pounds of naphthionate of soda, dissolved in about sixty gallons of water, are added. The color is formed very slowly, and should be stirred for several days The completion of the re-. action is ascertained when dye-tests show no improvement. The temperature is then. raised to boiling-point, and enough soda-lye added. to convert the color into its soda salt. It is then precipitated with common salt, filtered 01f, pressed, and dried. .The colorldyes unmordan-ted cotton a. bright red in an alka-' on, som

' NC H w Nu, S0 Na SO Na CI'IIS If the azo-naph'thaline-shlphoacidiS comvbined with the naphthionic acid'(toproduce.

the before mentioned alpha naphthaline monosulpho-a cid a o-aIPha-naphthylamine ,monos ulpho-acid) in presence of caustic soda;-

insteadof acetate'of .soda, asimilar body is Emample 2'..Th e'iutermediate product produced in the same manner as given in Ere ample l is reacted uponi twith twenty-five pounds of beta-naphth'yla'mine monosulpho- 5 acid soda saltoin. the place of the naphthiouic acid.

By tetrazo bodies I mean the following: tretrazo-diphenyl and its hom'ologucs, tetrazonaphthaline, tetrazo-stilbene, tetrazo-fluor- IQQ )-diphenolether,tetmzo-azo ben'zole omologues, tetrazo-oxydiphenyl, as ialkalized c0mpounds,or the carbo acids of the same.

now described my invention, what id desire to secure by Letters Patierein-described process for the p1: 0- T new azo coloring-matters which mslsts in combining one molecule the herein-mentioned tetrazo com- 1111 one molecule of the'herein-deaphthaline-azo-naphthylamine 0'1 compounds, and afterward acting :ermediate body thus formed. with ule of one of thenaphthylamines acids of the same, substantially. as

2 The process'for'prodneing new col'oringmatters by reversing the process in claim 1, by combining the tetrazo'hody first with one molecule of one of the naphthy'lamines or sulpho-acids of the same, and then reactingon the intermediate thus produced'with the."

RUPERT GREWILLEWILLIAMS.

Witnesses:

R. A. SHAW; I JOHN J VAN SCHOONHOVEN} Corrections injletters' Patent No.-416

It is hereby certified that in Letters Patent No. 416,145, grantgdNovember 26,189', upon the application of Rupert Grenville-Williams, of AlbanmfNow York, for an 1mprovement in"Proc sof Making Azo Dyes, errors appear in the-printed speclfica tion requiring c6rrection, as follows: In line'55,.page 1, 'the wprd. toluidine should V read-tolidine, and the formula following line 73, page 1, should read- QA S QDEL N 30 m some G a 2 and the said Letters Patent "1011111 be read with these oorretious therein that the 7 same may conform do tne'record of the case in the Patent mice.- I t Sigfied, countersigned and sealed this l0tli'dalyof Qeoeneimx, A. D. 1889.

[SEALJ CYRUS BUSSEY, Assistant fizsa ei ary of'the Interior.

Qountersigned:

' 0. E. MITCHELL? Commissions? of Patents.

V It is hereby cgtifi ed that in Letters Patent'N'oAl65145L, g mnted November 26, 1889, flton the applia gillqpero Grville-Williamg, ofAlbemyg, {EEew-Ydrk, for: mi irfipiow'rement'jin thie .Procesz of Mating jAz o-Dyesf" an "'e rror- .atggpfifit il? the pfintga'fl' 'sp'ecification reuiring the following oi'nettidn, viz: In line 3, iii, the Wbrdfialkalized should ra'a. dlkylizrji; ami that th sgid Ltters Batentshoui be mg with thisnorree. tidn therein that same-l my coni'orm the recoid of the case in the Patent fiigjle d, cquntersigngd, and sealed this 28th day of January, A; 111890..

sm y amnshnssEY. Assistant Soretarypfitha Intefiibv. Oouhtersi'gned:

0. 1E. MITQHELL.

Cqmmwsiohefoflqtnts. 

